Grate for stoves



(Model.) 2 Sheets-Sheet l4 G. PERKINS.

GRATE FOR STOVBS.

No. 250,389. Patented Deo. 6,188.1.

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G. PERKINS.

GRATE FOR sToVBs.

Patented Deo, 1881.

VVE/255555 CJWf Unirse STATES PATENT Carica.,

GUSTAVUS PERKINS, `OF BURLINGTON, VERMONT.

G RATE FO R STOVES.

SPECIFICATION forming part of Letters Patent'No. 250,389, dated December6, 1881.

Application led March 14, 1881. (Model.)

To all whom it may concer/lt Be it known that I, GUsTAvUs PERKINS, acitizen of the United States, residing at Burlington, in the county ot'Chittenden and State of Vermont, have invented certain new and usefulImprovements in Grates and Fire-Pots for Stoves and other HeatingApparatus; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to letters orfigures of reference marked thereon. which form a part of thisspecification.

My invention relates to improvements in grates and tire-pots which areadapted to all kinds of cooking or heating apparatus wherein coal orwood is used. Ihe grate is cylindrical in form,one side or portion beingdepressed to form a pocket. It is easily operated and simple inconstruction. It revolves within a guard or apron, the top of which isflanged to support the brick lining of the fire-box. This box is soarranged that by means ot' a portable partition or slide its size may bereduced.

The objects of my improvements are, first, to afford abundant facilitiesfor sifting and complete separation ot the ash, clinkers, and worthlessmaterial during combustion without the aid of any instruments, orpractically disturbing the bed of live coals; second, to provide acontinuous and reliable draft to the coals exterior to and independentof the grate; and, third,to supply a larger radiating-surface than ispossible with the grates now in use. I attain these objects by themechanism illustrated in the accompanying drawings,in which similarletters indicate like parts.

Figure l is a vertical crpss-section of my grate. Fig. 2is a verticallongitudinal section of the same. Fig. 3 is an enlarged detail view inperspective.

A is a pocket cylinder-grate, revolving upon the gudgeons b and c, whichproject outward from the center of the circular end pieces, B and C, ateither end, and turn upon supports at each end of the tire-box. It isrevolved by means of a crank, lever, or key adjusted on the end of thegudgeon c, which projects for that purpose through the side of thestove. The

grate A is composed of several parallel and similar sections, D, whichare separated from each other for the purposes of draft and sifting orclearing by the intervening braces d. These sections may be boltedtogether and to the end pieces, B and C, by rods extending horizontallythrough the braces and sections; or, if preferred, the grate may beformed of a single casting.

E is what I term the pocket77 in the grate A. It is formed by thecutting away of about one-fourth of each section, the sides beingvertical to the plane formed by the bottom, its depth being one-half ofthe diameter of the cylinder.

The circular pieces B and O constitute the ends of the pocket. The sidesand ends of the grate A are protected by the circular guard or apron F,in the top of Whichis an opening Which corresponds in size with that ofthe pocket E. From the opposite sides of this opening, and extendingdiagonally upward to the sides ot' the tire-box, are ribbed anges G andH.

The spaces I between the ribs J open into the hollow space between thesides of the guard and the sides ofthe lire-chamber, for the purpose ofa draft exterior to and above the grate. These anges are connected ateither end by the circular braces K and L, which pass over the endpieces,B and C, so that when the grate and guard are in position theinterior form of the guard F corresponds with that of the cylindricalgrate A, which revolves below and within it. i

The brick lining of the fire-box rests upon the ou-ter edges ot' theanges Gr and FI and the braces K and L, which are properly rabbeted toreceive it.

I prefer to support the guard F by projections or nubs especially castupon the sides ot' the tire-chamber. It may, however, rest upon thebed-plate used for the ordinary iiat grate, provided sufficient space isleft for a free draft in the fire-chamber exterior to the guard.

M is the ash pan or drawer, placed immediately below the grate, toreadily receive the siftings from the grate or the contents of thepocket E. This pocket extends from one end piece, B, to the other one,(l,and the bottom of the pocket is formed by the horizontal braces d.

N is a removable partition or separator, de-

signed to divide the combustion-chamber crosswise for the purpose ofmaterially reducing the size of the'box whenever it may be desired toeconomize in I[he use of coal or to modify the degree of heat. By theuse of this partition, when the fire is made in one end of the grate,the heat will be guided directly upward against the vessel which isplaced over the top of the re, instead of being diffused in alldirections, as is the case where no partition is used.

The practical advantages of my improved grate are its simplicity, theease with which it is worked, the saving in fuel, the possibility ofmaintaining a strong reliable fire for a great length of time, inasmuchas three-quarters of Vits surface constitutes a thorough sifter,clearing itself, while the gradual worthless accumulation at the bottomof the bed of coals can be readily dumped whenever desired withoutdisturbing the reliable fire at its upper surface. This dumping iseffected by turning the grate upon its pivots, and as the mouth of thepocket E is moved around the side of the grate moves under the bed ofcoals above the grate, and forms a support for the solid coals while theashes are being emptied out of the pocket. The coal is thus entirelyconsumed, and none is wasted with the ashes.

The circularform in cross-section of the grate also furnishes at leastthree times as large a radiating-surface as the ordinary dat grate. Atthe same time its revolving motion renders it more durable, as it isless liable to be warped or unfavorably affected by heat. Itsconvenience is apparent in its being able to present any portion of itssurface to the tire, while the depth of the pot can be changed to suitthe character of the fuel used,or the amount ofthe ire required, bymeans of a single turn of the crank or lever.

Where a large re is needed the pocket E is kept at the top of the grate,so that it can become lled with a solid bed of lire; but where but asmall fire is needed the pocket will turned downward, and then thecircular bottom part of the .grate will have the tire built upon itsreliable independent draft is obtained should the pocket become chokedwith useless material.

The grate is applicable to any heating apparatus by adapting its shapeto the form of the fire-pot.

To enable the operator to regulate the size of the fire-pot, especiallyfor cooking purposes, the removable partition or separator is bothconvenient and desirable.

I am aware that a cylindrical revolving grate is not new, and that arevolving grate having a recess or pocket in one side, but no endpieces, is not new, and this I disclaim.

What I .claim as my invention, and-desire to secure by Letters Patent,is

l. The combination ofthe revolving grate A, provided with the pocket E,with the guards F, anges G H, ribs J, and suitable-openings for thepassage of air, substantially as shown.

2. The combination, with the fire-pot of a stove or heating apparatus,of the revolving cylinder-grate, constructed with a pocket, and theguard or apron, constructed for an exterior draft through open anges onits upper side, and a removable partition, N,placed in thecombustion-chamber, substantially as described.

3. A revolving cylinder-grate, A, having the pocket E, and end pieces tokeep the fire from contact with the sides of the stove, in combinationwith the guards F, lianges G H, and ribs J, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

GUsrAvUs PERKINS.

Witnesses:

CHARLES E. ALLEN, OHAs. F. LEWIS.

